Triaryl-methane dyestuffs from tetraalkyl-diamino-benzophenones and di-1-naphthyl-ethylene-diamine



"Patented May 24, 1921.

' UNITED STATES PATENT OFFICE.

HEINRICH POLIKIER, or LEIPZIG, Ann HERBERT HKHLE, or DEssAu-z IEBIex, GER.- MANY, ASSIGNORS TO I. s. FARBENINDUSTR-IE AKTIENGESELLSCHAFT, or FRANK- FORT-ON-THE-MAIN, GERMANY.

TRIARYIi-METHANE DYESTUFFS FROM TETRAALKYL-DIAMINO-BENZOPHENONES AND DI-1-NAPHTHYL ETHYLENE-DIAMINE.

No Drawing. Application filed May 6, i926, Serial No. 107,228, and in Germany April 9, 1925.-

By the present invention blue violet dyebenzophenone used in the proportion of 1 stuffs of the triarylmethane series are made molecule of the former to two molecules of by the reaction between di-1-naphthylethylenediamine and tetra'all yl-4.4-'diamino- The new dyestuffs are characterized by remarkableclarity, colour strength and fastthe latter.

The dyestufl's correspond to the general formula stirred on the water bath until, it becomes solid.

The mass is then stirred in 1000 ness to washing. In their other dyeing parts of hot water and the dyestuff is sepaproperties they approximate the Victoria blue group (see Schultz, Farbstofl'tabel len, 6. Edition, 1. Vol., Nr. 558 and 559).

18 The following example illustrates the invention without limiting it, the parts being by weight:

54: parts of tetramethyl-4.4'-diaminobenzophenone, 31 parts of di-l-naphthylenedia- 20 mine and 30 parts of toluene are melted together. To the mixture, which is cooledto about 60 C. there are added 36 parts of phosphorus-oxychloride and the whole is rated in, crystalline form by adding a litties.

What we claim is:

ethylenediamine a dyestuff of similar proper- 1. The herein-described blue violet dye stuffs of the triarylmethane series which cor-.

respond to the general formula:

and which are substantially identical with 2. The herein-described blue Violet dye- 40 the dyestuffs manufactured by the reaction stuff of the triarylmetha-ne series which corbetween di-l-napthylethylenediamine and responds to the general formula:

tetraalkyl-4.4-diaminobenzophenone used in the proportion of 1 molecule of the former to 2 molecules of the latter.

and which is substantially identical with the I In testimony whereof we aflix our signa- Y dyestuff manufactured by the reaction be 50' tween di-l-naphthylethylenediamine and tetramethyl-4;4-diaminobenzophenoneused in the proportion of 1 molecule of the former to two molecules of the latter.

tures'.

HEINRICH PQLIKIER; HERBERT HAHLE. 

